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- Title
Potassium Absorption by Rice at Different Levels of Organization I. Effects of Temperature and Calcium on K<sup>+</sup> Fluxes and Content.
- Authors
ERDEI, LÁSZLÓ; ZSOLDOS, FERENC
- Abstract
A study was made of the effects of temperature and calcium on the properties of K+ transport in rice roots (Oryza sativa L. cv. Dunghan Shali), in cell suspension culture of rice and in callus cultures. The rates of influx and efflux of K+ were measured by using 86Rb as tracer, and the net change in K+ content was determined by atomic absorption spectrophotometry. In roots of low salt status the K+ transport mechanism exhibits a positive temperature- dependence and calcium exerts a stimulation. In cell and callus cultures a transport mechanism of this kind is lacking, and the K+ fluxes are inhibited by calcium and independent of temperature. Chilling-induced K+ leakage is similar for both types of tissue, and can be characterized by a negative temperature-coefficient and the inhibitory effect of calcium.
- Subjects
CELL culture; CULTURES (Biology); CELL lines; CELL suspensions; CALCIUM; CELLULAR mechanics
- Publication
Physiologia Plantarum, 1977, Vol 41, Issue 2, p99
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1977.tb05538.x